75384109 has 2 divisors, whose sum is σ = 75384110. Its totient is φ = 75384108.

The previous prime is 75384097. The next prime is 75384131. The reversal of 75384109 is 90148357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65124900 + 10259209 = 8070^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 75384109 - 2⁹ = 75383597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75384809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37692054 + 37692055.

It is an arithmetic number, because the mean of its divisors is an integer number (37692055).

Almost surely, 2^75384109 is an apocalyptic number.

It is an amenable number.

75384109 is a deficient number, since it is larger than the sum of its proper divisors (1).

75384109 is an equidigital number, since it uses as much as digits as its factorization.

75384109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 75384109 is about 8682.4022597436. The cubic root of 75384109 is about 422.4350406065.

The spelling of 75384109 in words is "seventy-five million, three hundred eighty-four thousand, one hundred nine".